ASUS TUF B450M-PLUS-PRO GAMING USB Overcurrent Detected

[ronelex]

Hello, so I got this ASUS TUF B450M-PLUS-PRO GAMING come in the shop with an issue of USB Overcurrent Issue. I already disconnect the USB connector going to the front USB port, and Check all port in the back and all are working and no short is detected,. Maybe someone can guide me how this USB Overcurrent Works because I got to boards with the same issue

[прямо]

I can mod the BIOS to disable the USB over current detection so it will not shutdown after 15 seconds, but you can only use Windows as the operating system. With Linux you will still get the USB OC message and continously spamming your terminal with it.

I have done this mod to an ASUS mobo that I own. I'm using the mobo daily for the past 2 years to help me test and repair graphics cards and I have no issue with the USB ports or any USB devices that I connect to it.

[ronelex]

I can mod the BIOS to disable the USB over current detection so it will not shutdown after 15 seconds, but you can only use Windows as the operating system. With Linux you will still get the USB OC message and continously spamming your terminal with it.

I have done this mod to an ASUS mobo that I own. I'm using the mobo daily for the past 2 years to help me test and repair graphics cards and I have no issue with the USB ports or any USB devices that I connect to it.

I already tried removing ESD Chip same issue, maybe this is the last option we can do, can you edit mine? I will read the back up

[прямо]

Upload it to file.io, and paste the link here. I will get back to you.

Removing ESD diodes don't really help. The same with checking the USB OC voltage sense resistor divider network. Mine are even still on point.

I found this problem to be specific only on Asus mobos with PCH chip that is going very hot all the time. It somehow messes up the USB OC detector inside the chip.

I don't know why they keep implementing this useless feature because it simply doesn't work at all, and there are already PTC fuses installed on board that can do the protection job much better.

[McWhitePink]

there are resistors connected to the OC pin, you should check those resistor values or maybe if any of them is open.
Last time I have this issue and found one resistor was off.
Should be easy to fix if you have the boardview file.

[ronelex]

Problem Solved, just a Leak 5 pin IC causing the overcurrent to activate

[ronelex]

Upload it to file.io, and paste the link here. I will get back to you.

Removing ESD diodes don't really help. The same with checking the USB OC voltage sense resistor divider network. Mine are even still on point.

I found this problem to be specific only on Asus mobos with PCH chip that is going very hot all the time. It somehow messes up the USB OC detector inside the chip.

I don't know why they keep implementing this useless feature because it simply doesn't work at all, and there are already PTC fuses installed on board that can do the protection job much better.

thanks for the idea I solved mine 1 of the OC measures below 3v which caused the problem, I solved the 2 units with the same IC Issue

[ronelex]

there are resistors connected to the OC pin, you should check those resistor values or maybe if any of them is open.
Last time I have this issue and found one resistor was off.
Should be easy to fix if you have the boardview file.

Mine is the 5 pin IC is leak which pull down the reading

[DynaxSC]

Hi, I have also one MSI board with same issue. Could you explain more in detail what 5-pin IC you mean, and what in this OC pin, i.e on which device it is located, PCH, SIO, ... ?

[mon2]

Each usb port on a good design will feature a usb current limit load switch. These sot23-5 or sot23-6 parts act like solid state relays that pass through to the usb connector, VBUS pin the +5V. If the current draw by the usb device is higher than the usb load switch peak current, the switch will kill the vbus rail to this connector. A fault is reported to the usb host controller by a status pin. Often, the usb load switch dies in the process and needs to be replaced.

[SMDFlea]

this is the bios i used after flash good no usb overcurrent but after booting windows then restart the issu is still there... can you do me a favor ?.. can you mod my bios so i can use it .. im only using windows btw.

All bios request must be posted in the BIOS & Schematic Requests! sub forum --> https://www.badcaps.net/forum/troubl...matic-requests

You can start a new thread and then post a link to it.

[McWhitePink]

Each usb port on a good design will feature a usb current limit load switch. These sot23-5 or sot23-6 parts act like solid state relays that pass through to the usb connector, VBUS pin the +5V. If the current draw by the usb device is higher than the usb load switch peak current, the switch will kill the vbus rail to this connector. A fault is reported to the usb host controller by a status pin. Often, the usb load switch dies in the process and needs to be replaced.

I still believe there is a hardware failure on your mobo. shouldn't be the bios issue

[Fernon@Repair]

Problem Solved, just a Leak 5 pin IC causing the overcurrent to activate

what is the 5 pin ic

[Fernon@Repair]

i have a same problem and same motherboard .... i all ready remove all esd protectors and reprogram bios . still not solve this problem what is the solution?

[Fernon@Repair]

thanks for the idea I solved mine 1 of the OC measures below 3v which caused the problem, I solved the 2 units with the same IC Issue

what is the ic brother .... can you show boadview

[Fernon@Repair]

Hello I Have a same problem ..... but my this usb ports not working . usb 5v are ok I already removed esd all protectors in my motherboard and reprogram bios but still comming usb over current detected message and this 2 usb ports are notworking ...anyone have solution

[Fernon]

I can mod the BIOS to disable the USB over current detection so it will not shutdown after 15 seconds, but you can only use Windows as the operating system. With Linux you will still get the USB OC message and continously spamming your terminal with it.

I have done this mod to an ASUS mobo that I own. I'm using the mobo daily for the past 2 years to help me test and repair graphics cards and I have no issue with the USB ports or any USB devices that I connect to it.

Bro you have mod bios ?

[прямо]

Just so people don't keep sending me a chat message about disabling the USB over current auto shutdown.

The ZIP contain the modded BIOS CAP files for PRO and PLUS, latest version 4622. They have been verified to work by user Fernon